I am going to Alaska in August and September where mosquitoes are in abundance. I plan to spray my clothing with Permethrin. Is it still toxic to cats once it has dried on the clothing, such as jeans and socks, where cats often sit on laps or rub up against socks? Does it continue to be toxic until completely out of the clothing? I'll go with the aggravation and discomfort of the bites if there is any chance that my 3 kitties could be hurt.